Isaiah 7-8 is the Immanuel crisis cycle. Judah is terrified, Ahaz is politically calculating, foreign kings are closing in, and the house of David is tempted to secure itself by human arrangement rather than by faith.
Read and follow along: https://orthodoxbiblestudy.com/bible-studies/old-testament/isaiah/isaiah-7-8-immanuel-and-assyrian-threat